Ladder



Jan 5, 1937- E. w. l. LuNDsTRM 2,066,990

' i LADDER I Filed Aug. 9, 1935 Patented Jan. 5, 1937 UNITED STATES PATENT OFFICE Swed Application August 9, 1935, Serial No. 35,457 In Sweden February 15, 1933 2 Claims.

Ladders of known constructions have the drawback that they become heavy and rickety when of large dimensions and that the standards are weakened at the places, where the rungs are xed. The present invention provides a ladder in which each standard consists of two spaced laths or strips, which are rigidly united with each other, and the ladder is characterized substantially by the fact that one lath is placed edge-V wise to the other lath so that in cross section they form a T, and that the rungs are squeezed in the interspace between the two laths. Y

An embodiment of the invention is illustrated in the accompanying drawing. l5 Figure 1 is a side View of the ladder,

Figure 2 part of the ladder in front view and Figure 3 a detail on a larger scale. Figure 4 is a section through the detail shown in Figure 3. 20 The standards I of the ladder consist of two laths or strips 2 and 3, between which the rungs 4 are squeezed. The laths 2 and 3 have rectangular cross section and one lath is placed edgewise to the other. In the point of intersection 25 (Figure 3) of the laths or strips 2 and 3 of the standards and of the rung 4 there is provided one or more through bolts 5 or the like, in order to press the laths or strips against the rungs.

The rungs 4 are all shown as having the same cross-sectional dimension and the two strips 2 and 3 have a parallel arrangement for the full 5 distance between the end rungs of the ladder.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A ladder in which each side is made from two strips, each rectangular in cross section and having one face wider than the other, the two strips of each side being arranged with the narrow face of one strip opposed to the Wide face of the other strip, rungs having their ends disposed between the strips forming said sides, and means securing the two strips of each side together at each rung, the strips of each side having a parallel arrangement for the full distance between the end rungs of the ladder.

2. A ladder as set forth in claim 1 in which each rung has each end clamped between the strips by a bolt extending through the strips and the rung end.

ERIK WILHELM IVAN LUNDSTRM. 

